Question
A boat covers 540 km upstream and downstream in 't'
time. If the speed of the stream is 8 km/h and the speed of the boat is 10 km/h then find the value of 't'.Solution
Let the speed of boat in still water =B and speed of stream =S then B=10km/h and S= 8km/h So now Speed of Boat in upstream = B-S=2km/h Speed of Boat in Downstream =B+S=18km/h ATQ- t=540/18+540/2 =30+270 =300hours.
A sequence {Sₙ} is defined by:
Condition I: S₁ = 3 and for all n ≥ 2, Sₙ = 2·Sₙ₋₁ + (−1)ⁿ.
Condition II: The second ter...
27 44 63 86 ? 146
6 16 116 566 2272 6814
11 a�...
100, 110, ?, 171.6, 240.24, 360.36
31 16.5 18 �...
104 136 152 160 164 ?
...30 32 67 206 ? 4166
625, 5, 125, 25, 25, ? , 5
16 4 2 1.5 1 1.875
...130 155 146 195 186 ?
...
Relevant for Exams:
